because in reality I don't know those answers. but google knows
There is a little story about that... In short: Once get two students of geograhy midle of Town hall square argumented, what country's capital is Copenhagen.... they walked to nearest Computer and checked it out from internet. Moral of the story: Internet is bad. It's normal if I don't know such things In fact If I heard that story I not knowed what country's capital Copenhagen is.. well only the region where it is...
5. Tokyo, Newyork, Mexico, Soul, Mumbai. http://www.pubquizhelp.34sp.com/geo/popcity.html